The successful boost helped the X-51 hypersonic scramjet engine to accelerate to a historic Mach 5, a first for the vehicle.

The X-51 WaveRider is an unmanned aerial vehicle designed for extended hypersonic flight durations. The successful boost with the ATACMS rocket motor will allow for future advancements in hypersonic flight.

In this test, the modified ATACMS motor was air-launched from a B-52 aircraft at 50,000 feet, and data collected validates its performance well beyond the original design specifications.

This was the first time an ATACMS rocket motor has been used as a booster for an air-launched vehicle. More tests using the ATACMS motor are planned.

The modified motor included a Boeing designed lightweight, high performance exit cone which was produced by Aerojet, a GenCorp [NYSE:GY] company, for Lockheed Martin. The program is managed by a Boeing and Pratt and Whitney Rocketdyne team for the U.S. Air Force and DARPA.

"The ATACMS rocket motor has proved its power in combat, and now we're happy to see it performing a mission that advances hypervelocity flight technology," said Scott Arnold, vice president of Precision Fires at Lockheed Martin Missiles and Fire Control.

"We are proud to have played a part in this new milestone in hypersonic flight and to have been given the opportunity to demonstrate our ability to modify existing motor designs for future applications," said John Myers, vice president of Tactical Programs for Aerojet.

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